Upon approval of the release plan, the board shall issue a certificate of release, which shall state therein the release date, the conditions of parole and other relevant aspect of the release plan, and such instructions to the prisoner as the board considers appropriate. The certificate shall be signed by the chairman and shall provide the authority for the prison warden to release the prisoner from confinement. The certificate shall state the date parole terminates which shall be no later than the maximum term for which he was originally sentenced. A copy of the certificate shall be delivered personally to the prisoner by the prison warden.